Key chain charm



FIG. 1 is a top front perspective view of a key chain charm embodying the new design;

FIG. 2 is a side view of the key chain charm of FIG. 1;

FIG. 3 is a side view of the key chain charm of FIG. 1;

FIG. 4 is a side view of the key chain charm of FIG. 1; and,

FIG. 5 is a top view of the key chain charm of FIG. 1.

The broken lines showing a key chain and key represent environmental matter and form no part of the claimed design. 

CLAIM The ornamental design for a key chain charm, as shown and described. 